Coke-oven front



(No Model.) I I E.H.BRADLEY.

00KB OVEN FRONT. No. 369,094. Patented Aug. 30, 1887.

N. PErEnS. PIMn-Lilhogfllpher. wnhingtm n. c..

UNITED STATES PATENT ()EFICE.

EDWARD H. BRADLEY, or LAYTONS STATION, PENNSYLVANIA.

COKE-OVEYN FRONT,

SPECIFICATION forming part of Letters Patent No. 369,094, dated August 30, 1887.

Application filed September 4, 1886. Serial No. 212,747.

To aZZ whom it may concern: Beitknown that I, EDWARD H. BRADLEY, o Laytons Station, in the county of Fayette and State of Pennsylvania, have invented certain new and useful Improvements in the Construction of Arches for Coke-Oven Doors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such vention.

as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to an improvement in arches over coke-oven doors, theobject being to provide an arch that can readily be placed in position, of simple and durable construction and small initial cost; and withthese ends in view my invention consists in certain details of construction and combination of parts, as will be fully described hereinafter. v

In the accompanying drawings, Figure l is a front elevation of an arch over a coke-oven door constructed in accordance with my in- Fig. 2 is a side sectional view of the same. Fig. 3 is a perspective view of one of the skewbacks used in the construction of the arch.

To put my invention into practice I provide a set of skewbacks or large tile, a, constructed as shown at Fig. 3 on the drawings, and place the same in position on either side of the 0pening of the door d. These skewbacks constitute theabutments of the arch, and each skewback is constructed with a vertical face, a, a vertical back, a, a short outward-inclined plane, a, a long inclined plane, a a horizontal bottom surface, a, an inclined surface, a", an inclined surface, a and an inclined surface, a. From these skewbacks a, I spring an arch composed of a suitable number of bricks, g, molded in the form of a key or wedge, and having the joints of the several bricks broken, or, in other words, having the joints of the bricks of the upper course, b, placed 1 Attest:

(No model.)

near or at the center of the bricks of the lower course, 0. These skewbacks a, together with the bricks g of the lower arch, c, are chamfered or beveled from the inside of the oven to about the middle of the bricks. This construction allows the workman a means of reaching the top of the coke in the oven. The bricks forming the top arch, b, are also beveled at'one end, as indicated at 3 Fig. 3, on which the arch or crown f of the oven is commenced. It will thus be seen that the skewbacks a a are adapted to the supporting-walls, to the spring of the arch, to the two courses of the voussoirs at the end of the arch, and also to the chamfered or beveled surfaces of the lower course of voussoirs. I am aware that it is old to construct arches of masonry of two or more courses of bricks, and I am also aware that it is old to construct coke oven fronts with outwardly and inwardly beveled tiles, brick's, or voussoirs, andI disclaim such an arch. 7

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

In a coke oven, a door-arch composed of the polygonal abutments or skewbacks a a, formed with the vertical face a, the vertical back ed, the short'outwardinclined plane a, the long inclined plane a the horizontal bottom surface, a, the inclined surface ed, the inclined surface a", and the inclined surface a, in combination with the lower course of arch-blocks g, flaring upward and inward and having bev eled sides, and the upper course of arch-blocks g, beveled downwardly and inwardly and breaking joints with the blocks forming the lower arched course, the front ends of the two courses I) 0 being beveled, as shown anddescribed.

EDWARD H. BRADLEY.

G. 0. LEE, M. E. HARRISON. 

